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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66720完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 陳琪芳 | |
| dc.contributor.author | Yu-Wei Liu | en |
| dc.contributor.author | 劉育維 | zh_TW |
| dc.date.accessioned | 2021-06-17T00:53:26Z | - |
| dc.date.available | 2012-01-17 | |
| dc.date.copyright | 2012-01-17 | |
| dc.date.issued | 2011 | |
| dc.date.submitted | 2011-10-18 | |
| dc.identifier.citation | [1] D. Lee and M. H. Schultz, 'Numerical Ocean Acoustic Propagation in Three Dimensions,' World Scientific,1995.
[2] F. D. Tappert, 'The parabolic equation method,' in Wave Propagation and Underwater Acoustics, Lecture Notes in Physics, Vol.70, eds. J. B. Killer and J. S. Papadakis (Springer, Berlin, 1977). [3] J. S. Perkins and R. N. Baer, 'An approximation to the three-dimensional parabolic-equation method for acoustic propagation,' J. Acoust. Soc. Am. , vol. 72, pp. 515-522, 1982. [4] R. N. Baer, 'Propagation through a three‐dimensional eddy including effects on an array ,' J. Acoust. Soc, Am. vol. 69, pp. 70-75, 1981. [5] D. Lee, Y. Saad, and M. H. Schultz, 'An efficient method for solving the tree-dimensional wide angle wave equation,' in Computational Acoustics- Wave propagation, eds. D. Lee, R. L. Sternberg, and M. H. Schultz (North-Holland, Amsterdam ,1986) pp. 75-90. [6] R. Varga, Matrix Iterative Analysis. New Jersey: Prentice Hall, 1960. [7] D. Lee and S. T. McDaniel,'Ocean Acoustic Propagation by Finite Difference Methods,' (Pergamon, Oxford, 1988). [8] F. B. Jensen, et al., Computational Ocean Acoustics. New York: AIP Press, 1993. [9] G. Botseas, D. Lee, and D. King , 'FOR3D : A computer model for solving the LSS three-dimensional wide angle wave equation,' Naval Underwater Systems Center, TR#7943 (1987). [10] 張寶琳, '偏微分方程並行有限差分方法, ' 北京市, 1994. [11] 林聰悟、林佳慧, '數值方法與程式, ' 台北市, 1997. [12] Timothy F. Duda, 'Initial Results from a Cartesian Three-Dimensional Parabolic Equation Acoustical Propagation Code,' Woods Hole Oceanographic Institution Technical Report, WHOI-2006-14, 2006. [13] D. Benjamin Reeder, Barry B. Ma, Yiing Jang Yang, 'Very large subaqueous sand dunes on the upper continental slope in the South China Sea generated by episodic, shoaling deep-water internal solitary waves , 'Marine Geology 279 (2011) 12–18 [14] 許明光、劉安國, '神秘的巨浪-南海內波,' 科學發展, 446期, pp. 52-61, 2010年2月. [15] A. K. Liu, S. Y. Chang, M. K. Hsu and N. K. Liang, 'Evolution of nonlinear internal waves in the East and South China Seas,' J. Geophys. Res. Oceans, vol. 103 , no. C4 , pp. 7995-8008 , April 15 1998. [16] M. H. Orr and P. C. Mignerey, ' Nonlinear internal waves in the South China Sea: Observation of the conversion of depression internal waves to elevation internal waves,' J. Geophys. Res. , vol. 108, no. C3, 2003. [17] A. E. Newhall, et al., 'Preliminary Acoustic and Oceanographic Observations from the ASIAEX 2001 South China Sea Experiment,' Woods Hole Oceanographic Institution Technical Report, WHOI-2001-12, 2001. [18] 張志瑋,”非線性內波對水下音傳的三維擾動效應”,國立臺灣大學海洋研究所碩士論文,7月,2011 [19] Li-Wen Hsieh, Chi-Fang Chen, Mei-Chun Yuan and Ying-Tsong Lin,' AZIMUTHAL LIMITATION IN 3D PE APPROXIMATION FOR UNDERWATER ACOUSTIC PROPAGATION,' Journal of Computational Acoustics, Vol. 15, No. 2,p.p. 221–233,2007 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/66720 | - |
| dc.description.abstract | 海洋環境複雜多變，導致我們很難得到任何時刻下的實際聲場，所以我們希望可以藉由模擬計算，來了解各種不同環境對聲場的影響。
由於圓柱座標適合用來描述聲音傳播現象，所以大多數的模擬計算都是以圓柱座標系來表示，但圓柱座標的弧長會隨距離而增加，若我們想要了解沿某一聲音傳遞路徑下，離聲源較遠處的區域內環境對聲波傳遞的影響，則可能會因計算間距過大導致無法完整描述此環境，甚至使得角度的耦合效應消失，但卡氏座標的間距並不會隨距離而增加。 本篇論文內容是以FOR3D(圓柱座標模式)為基礎，加入局部卡氏座標轉換而得之數值模式，以解決特定方位角之音傳路徑的局部卡氏座標模式，其適用範圍為5°以內。 | zh_TW |
| dc.description.abstract | As the complexity of the marine environment leads to the difficulty to get the actual sound field at any moment, so we hope to understand the influence of a variety of different environments on the sound field by numerical simulation.
Cylindrical coordinate is adaptable to describe the phenomenon of sound propagation, so most of numerical model are based on cylindrical coordinate. However since the arc length in cylindrical coordinate is proportional to range, for receiving position far away for the source, the azimuthal coupling effect would not be incorporated for the distances between two neighboring grid points in the azimuthal direction are too large. In Cartesian coordinate, the arc length would not increase as the range increases. Numerical models in Cartesian coordinate could avoid this drawback as mentioned above. This thesis presents a modified version of FOR3D, which solves the acoustic field in local Cartesian coordinate system along a radial direction. The limitation of the azimuthal range is about five degrees. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T00:53:26Z (GMT). No. of bitstreams: 1 ntu-100-R98525096-1.pdf: 3513935 bytes, checksum: aab16b41925b26935100455acb7c563c (MD5) Previous issue date: 2011 | en |
| dc.description.tableofcontents | 誌謝 i
中文摘要 ii ABSTRACT iii 目錄 iv 圖目錄 vi 符號目錄 viii 第 1章 緒論 1 1.1 背景介紹 1 1.2 研究動機 1 1.3 研究目的及方法 2 1.4 文獻回顧 3 第 2章 三維聲場模擬 5 2.1 圓柱座標在三維聲場模擬之問題 5 2.2 三維水下音傳局部卡氏座標模式 5 2.3 初始場(Initial field)及邊界條件 14 第 3章 算例分析 19 3.1 驗證局部卡氏座標模式 19 3.2 均質環境 20 3.3 地形環境變化 28 3.4 水文環境變化 37 第 4章 結果討論 45 參考文獻 46 附錄A. 48 | |
| dc.language.iso | zh-TW | |
| dc.subject | 卡氏座標 | zh_TW |
| dc.subject | 三維 | zh_TW |
| dc.subject | 圓柱座標 | zh_TW |
| dc.subject | 音傳模式 | zh_TW |
| dc.subject | three_dimension | en |
| dc.subject | Cartesian coordinate | en |
| dc.subject | acoustic propagation model | en |
| dc.subject | cylindrical coodinate | en |
| dc.title | 三維水下音傳局部卡氏座標模式 | zh_TW |
| dc.title | Three-dimensional underwater acoustic propagation model in the local Cartesian coordinates | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 100-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 黃乾綱,邱永盛 | |
| dc.subject.keyword | 三維,卡氏座標,音傳模式,圓柱座標, | zh_TW |
| dc.subject.keyword | three_dimension,Cartesian coordinate,acoustic propagation model,cylindrical coodinate, | en |
| dc.relation.page | 54 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2011-10-18 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
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